Power and speed transmission, especially in motor vehicles



May 27, 1941.

Jnrenfor: G 0554 v Ne er Attorney G. MEYER 2,243,482 POWER AND SPEED TRANSMISSION ESPECIALLY IN MOTOR VEHICLES Filed Feb. 10, 1940 Patented May 27, 1941 mm in Gustav Meyer,

many, assign MOTOR VEHICLES or'to Maybach-Motorenbau G. 111.

b. H., Friedrichshafen, Bodensee, Germany Applicatilon-February10, 19 i0, Serial No.v 318345 Germany February 10, 1939 a (of 14-323) My invention relates to' power and speed transmissions and has special reference to transmissions of this. kind include a change speed gear. .Change speed gears ofthe usual type being provided with -a main shaft and an auxiliary shaft, both with gears for the difierent transmission ratios, afford an increase in speed in the rotation of shaft for the purpose of performing a speed change.

the main in motor vehicles which Object-of my invention is to provide means for simplifying such speed changes and for reducing the time necessary for their performance. Another object is to make such additional means as small as possible so that no additional space is needed for providing them. There are still other objects as will easily be seen. from. the following specification.

.main shaft in the change speed gear.

purpose I make use of the fact that usually in change speed gears there is a pair of constantly meshing gears positioned most closely towards the incoming en of the gear casing. This gear pair normally diameter fixed to the main shaft and fixed to the lay shaft, so that this constant drive causes the lay shaft to'rotate at slower speed than the main shaft. In accordance with my invention 1 make use of this gear pair in the reverse direction in the following manner. I provide an. extension to the lay shaft and another gear thereon. This gear is adapted to mesh with a gear on the motor shaft. This entire additional transmission allows for the main shaft of the change speed gearto be rotated by the motor even when the main clutch between the motor interrupted. As of the first pair of gears in the gear is so chosen that the slower than the main shaft this will now cause the main shaft to be increased in speed when and the change vention I now want of the type mentioned above clutch 3 is situated.

serve to its purpose.

on the motor shaft.'

change speed gear connected thereto.

over the main clutch isinterrupted and no essen tial force is transmitted. Consequently, this additional transmission in its dimensionsmay be comparatively small, thin and'light and yet This transmission must, of ruptable, for example by shifting one of the gears or by providing a clutch or the like for. the. gear on the motor shaft-or in I with the extension of the lay shaft. Iprefer to have a kind of manually orautomatically operated conical friction clut h by means of which the lay sha t extension may be disconnected from this shaft.

be advisable toshape the outer portion of the main clutch being in driving connection adapted to mesh with the other gear on the lay shaft extension; thus saving an additional gear my into point it out more in detail havingreference to the drawing which represents an example embodying 'my'invention.

The figure is a more diagrammatic side view-'- partly in section-on the rear end of a motor, the main clutch and the forward end of the shaft 2 of the motor I and the the change speed gearv (of which Between the main shaft 9 of only one pair of It isof the laminated inc tion clutch type and adapted to be engaged -or the gear ratio change speed lay shaft rotatesdriven by my new additional transmission. This efliect may still adequate gear shaft and on be increased by. choosing an gear has to letter mentioned. Whenever transmission according to my-invention is used;

the mainshaft of the change for ratio for the additional gears.

- it may cause driving .is-in driving connection with disengaged by means of shifting member I; and

shaft 2 and main shaft 9 of the change speed gear. Fixed to this shafts is gear H which meshes with gear l3 fixed to lay shaft l2. v

A narrow gear I! fixed to motor shaft 2 meshes gear I8 loosely journaled on shaft 19, which lay shaft B by means of. splines 20. A conical friction clutch 2 l l2}, adapted to be operated by means of levers indicated at 23 and 24 allows for engagement of gear l8 to shaft l9. The operation of Assuming the main-clutch- 3 was interrupted of performing a speed-chan e m thechange speed gear which necessitates acceleration of main shaft 9, then by ated to cause driving-connection I8 and shaft I5. consequen y th shaft. becurse of the gear ratio I'll" is rotated cthlgher speed than the motor shaft}, and because of course, be inter-.

gears is represented) the mainconnection between motor the mechanism as follows:

the gear ratio l3/l I, main shaft 9 of the change speed gear rotates again faster. Thus the necessary acceleration of this latter shaft is attained in shortest time and with the simplest possible means.

I do not Want to be limited to the details described or shown in the drawing as many variations will occur to those skilled in the art without deviating from the scope of my invention.

What I claim is:

1. A power and speed transmission comprising: a motor shaft, a change speed gear for performing speed changes, including a main shaft and a lay shaft in constant driving connection with said main shaft, a disengageable main clutch between said motor shaft and said change speed gear, and means driven by the motor shaft and operative through the lay shaft to increase the speed of rotation of said main shaft when said main clutch is disengaged. r 2. A power and speed transmission of the kind comprising: a motor shaft, a change speed gear for performing speed changes, including a main shaft and a lay shaft in constant driving connec-- tion with each other, a disengageable main clutch inserted between said motor shaft and said,

change speed gear, and means for increasing the speed of rotation of said main shaft, when said main clutch is disengaged, said means comprising: a. gear fixed to said motor shaft, an extension to said lay shaft a gear loosely journaled on said extension and meshing with said aforementioned gear, a friction clutch adapted to cause driving connection between said lay shaft .extension and said last mentioned gear.

3. A power and speed transmission as claimed in claim ,2, further including the feature that said gear fixed to said motor shaft is larger in diameter than saidgear loosely journaled on said extension.

4. A power and speed transmission comprising: a motor shaft, a change speed gear for performing speed changes, including a main shaft and a lay shaft in constant driving connection with said main shaft, a disengageable main clutch between said motor shaft and said change speed gear, and means independent of the main shaft for driving the lay shaft from the motor shaft and being operative through the lay shaft to increase the speed of rotation of the main shaft when said main clutch is disengaged.

5. A power and speed transmission comprising:

- a motor shaft, a change speed gear for performing speed changes, including a main shaft, a lay shaft, and a constant driving connection between said main and lay shafts, a disengageable main clutch between said motor shaft and said main shaft, and auxiliary means driven from the motor shaft and operative through said constant driving connection between the main and lay shafts to speed up the main shaft when said main clutch is disengaged.

6. A power and speed transmission comprising: a motor shaft, 9. change speed gear for performing speed changes, including a main shaft, a lay shaft, and a constant driving'connection between the main and lay shafts, and disengageable main main shaft clutch is disengag without making use of the means for throwing said' additional driving conclutch interconnecting the motor shaft and the main shaft, auxiliary driving means for driving the main shaft from the motor shaft through the lay shaft when the main clutch is disengaged, and means for making and breaking the driving connection through said auxiliary driving means.

7. A power and speed transmission comprising: a motor shaft, a change speed gear for performing speed changes, including a main shaft and a lay shaft in constant driving connection with said main shaft, 3. disengageable main clutch between said motor shaft and said change speed gear, a rotary direct driving connection from said motor shaft to said lay shaft for increasing the speed of rotation of the main shaft when the main d, and means for interrupting said rotary direct riving connection. I

8. A power and speed transmission comprising: a motor shaft, a change speed gear for performing speed changes, including a main shaft and a lay shaft in constant driving connection with said main shaft, a disengageable main-clutch between said motor shaft and said change speed gear, and means for increasing the speed of rotation of the main. shaft when the main clutch is disengaged comprising a gear wheel on the motor shaft, an extension of the lay sh'aft, a second gear wheel on said extension, in driving connection with said first gear wheel, one.of said gear wheels being fixed to its shaft and the other of said gear wheels being loosely mounted on its shaft, and means for connecting and disconnecting the loosely mounted gear wheel to and from its shaft.

9. A power and speed transmission comprising: 'a motor shaft, a change speed, gear for performing speed changes, including a. main shaft and a lay shaft in constant driving connection with said main shaft, a disengageable main clutch between said motor shaft and said change speed gear, and means for increasing the speed of rotation of the when the main clutch is disengaged comprising an extension of the lay shaft, 9. gear wheel drive adapted to drive said extensiontogether withsaid lay shaft from the motor shaft main clutch, and

nection between the motor, shaft and the lay shaft into and out of engagement.

10. A power and speed transmission comprising: a motor shaft, a speed change gear for performing speed changes, including a main shaft and a lay shaft in constant driving connection with each other, a disengageable main clutch inserted between said motor shaft and said change speed gear, and auxiliary driving means for increasing the speed of rotation of said main shaft, when said main clutch is disengaged, said means comprising an extension of the lay shaft, a driving gear on the main shaft, a gear on the lay shaft extension-driven by said'driving gear, said gear on the motor shaft being of larger diameter than said gear on the lay shaft extension, and

clutch means for making and breaking the driving connection through said auxiliary driving means.

- GUSTAV MEYER. 

